2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
9 * The code this is based on carried the following copyright notice:
11 * (C) Copyright 2001-2006
12 * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
13 * Re-worked by Ben Greear <greearb@candelatech.com>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/slab.h>
22 #include <linux/string.h>
23 #include <linux/rculist.h>
24 #include <linux/notifier.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/ethtool.h>
28 #include <linux/if_arp.h>
29 #include <linux/if_link.h>
30 #include <linux/if_macvlan.h>
31 #include <net/rtnetlink.h>
34 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
37 struct net_device
*dev
;
38 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
39 struct list_head vlans
;
43 #define macvlan_port_get_rcu(dev) \
44 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
45 #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
46 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
48 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
49 const unsigned char *addr
)
51 struct macvlan_dev
*vlan
;
54 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[addr
[5]], hlist
) {
55 if (!compare_ether_addr_64bits(vlan
->dev
->dev_addr
, addr
))
61 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
63 struct macvlan_port
*port
= vlan
->port
;
64 const unsigned char *addr
= vlan
->dev
->dev_addr
;
66 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[addr
[5]]);
69 static void macvlan_hash_del(struct macvlan_dev
*vlan
)
71 hlist_del_rcu(&vlan
->hlist
);
75 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
76 const unsigned char *addr
)
78 macvlan_hash_del(vlan
);
79 /* Now that we are unhashed it is safe to change the device
80 * address without confusing packet delivery.
82 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
83 macvlan_hash_add(vlan
);
86 static int macvlan_addr_busy(const struct macvlan_port
*port
,
87 const unsigned char *addr
)
89 /* Test to see if the specified multicast address is
90 * currently in use by the underlying device or
93 if (!compare_ether_addr_64bits(port
->dev
->dev_addr
, addr
))
96 if (macvlan_hash_lookup(port
, addr
))
103 static int macvlan_broadcast_one(struct sk_buff
*skb
,
104 const struct macvlan_dev
*vlan
,
105 const struct ethhdr
*eth
, bool local
)
107 struct net_device
*dev
= vlan
->dev
;
112 return vlan
->forward(dev
, skb
);
115 if (!compare_ether_addr_64bits(eth
->h_dest
,
117 skb
->pkt_type
= PACKET_BROADCAST
;
119 skb
->pkt_type
= PACKET_MULTICAST
;
121 return vlan
->receive(skb
);
124 static void macvlan_broadcast(struct sk_buff
*skb
,
125 const struct macvlan_port
*port
,
126 struct net_device
*src
,
127 enum macvlan_mode mode
)
129 const struct ethhdr
*eth
= eth_hdr(skb
);
130 const struct macvlan_dev
*vlan
;
131 struct hlist_node
*n
;
132 struct sk_buff
*nskb
;
136 if (skb
->protocol
== htons(ETH_P_PAUSE
))
139 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
140 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[i
], hlist
) {
141 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
144 nskb
= skb_clone(skb
, GFP_ATOMIC
);
145 err
= macvlan_broadcast_one(nskb
, vlan
, eth
,
146 mode
== MACVLAN_MODE_BRIDGE
);
147 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
148 err
== NET_RX_SUCCESS
, 1);
153 /* called under rcu_read_lock() from netif_receive_skb */
154 static struct sk_buff
*macvlan_handle_frame(struct sk_buff
*skb
)
156 struct macvlan_port
*port
;
157 const struct ethhdr
*eth
= eth_hdr(skb
);
158 const struct macvlan_dev
*vlan
;
159 const struct macvlan_dev
*src
;
160 struct net_device
*dev
;
163 port
= macvlan_port_get_rcu(skb
->dev
);
164 if (is_multicast_ether_addr(eth
->h_dest
)) {
165 src
= macvlan_hash_lookup(port
, eth
->h_source
);
167 /* frame comes from an external address */
168 macvlan_broadcast(skb
, port
, NULL
,
169 MACVLAN_MODE_PRIVATE
|
171 MACVLAN_MODE_BRIDGE
);
172 else if (src
->mode
== MACVLAN_MODE_VEPA
)
173 /* flood to everyone except source */
174 macvlan_broadcast(skb
, port
, src
->dev
,
176 MACVLAN_MODE_BRIDGE
);
177 else if (src
->mode
== MACVLAN_MODE_BRIDGE
)
179 * flood only to VEPA ports, bridge ports
180 * already saw the frame on the way out.
182 macvlan_broadcast(skb
, port
, src
->dev
,
187 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
192 if (unlikely(!(dev
->flags
& IFF_UP
))) {
196 len
= skb
->len
+ ETH_HLEN
;
197 skb
= skb_share_check(skb
, GFP_ATOMIC
);
198 macvlan_count_rx(vlan
, len
, skb
!= NULL
, 0);
203 skb
->pkt_type
= PACKET_HOST
;
209 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
211 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
212 const struct macvlan_port
*port
= vlan
->port
;
213 const struct macvlan_dev
*dest
;
215 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
216 const struct ethhdr
*eth
= (void *)skb
->data
;
218 /* send to other bridge ports directly */
219 if (is_multicast_ether_addr(eth
->h_dest
)) {
220 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
224 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
225 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
226 unsigned int length
= skb
->len
+ ETH_HLEN
;
227 int ret
= dest
->forward(dest
->dev
, skb
);
228 macvlan_count_rx(dest
, length
,
229 ret
== NET_RX_SUCCESS
, 0);
231 return NET_XMIT_SUCCESS
;
236 skb_set_dev(skb
, vlan
->lowerdev
);
237 return dev_queue_xmit(skb
);
240 netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
241 struct net_device
*dev
)
243 int i
= skb_get_queue_mapping(skb
);
244 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
245 unsigned int len
= skb
->len
;
248 ret
= macvlan_queue_xmit(skb
, dev
);
249 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
251 txq
->tx_bytes
+= len
;
257 EXPORT_SYMBOL_GPL(macvlan_start_xmit
);
259 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
260 unsigned short type
, const void *daddr
,
261 const void *saddr
, unsigned len
)
263 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
264 struct net_device
*lowerdev
= vlan
->lowerdev
;
266 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
267 saddr
? : dev
->dev_addr
, len
);
270 static const struct header_ops macvlan_hard_header_ops
= {
271 .create
= macvlan_hard_header
,
272 .rebuild
= eth_rebuild_header
,
273 .parse
= eth_header_parse
,
274 .cache
= eth_header_cache
,
275 .cache_update
= eth_header_cache_update
,
278 static int macvlan_open(struct net_device
*dev
)
280 struct macvlan_dev
*vlan
= netdev_priv(dev
);
281 struct net_device
*lowerdev
= vlan
->lowerdev
;
285 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
288 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
291 if (dev
->flags
& IFF_ALLMULTI
) {
292 err
= dev_set_allmulti(lowerdev
, 1);
296 macvlan_hash_add(vlan
);
300 dev_uc_del(lowerdev
, dev
->dev_addr
);
305 static int macvlan_stop(struct net_device
*dev
)
307 struct macvlan_dev
*vlan
= netdev_priv(dev
);
308 struct net_device
*lowerdev
= vlan
->lowerdev
;
310 dev_mc_unsync(lowerdev
, dev
);
311 if (dev
->flags
& IFF_ALLMULTI
)
312 dev_set_allmulti(lowerdev
, -1);
314 dev_uc_del(lowerdev
, dev
->dev_addr
);
316 macvlan_hash_del(vlan
);
320 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
322 struct macvlan_dev
*vlan
= netdev_priv(dev
);
323 struct net_device
*lowerdev
= vlan
->lowerdev
;
324 struct sockaddr
*addr
= p
;
327 if (!is_valid_ether_addr(addr
->sa_data
))
328 return -EADDRNOTAVAIL
;
330 if (!(dev
->flags
& IFF_UP
)) {
331 /* Just copy in the new address */
332 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
334 /* Rehash and update the device filters */
335 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
338 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
342 dev_uc_del(lowerdev
, dev
->dev_addr
);
344 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
349 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
351 struct macvlan_dev
*vlan
= netdev_priv(dev
);
352 struct net_device
*lowerdev
= vlan
->lowerdev
;
354 if (change
& IFF_ALLMULTI
)
355 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
358 static void macvlan_set_multicast_list(struct net_device
*dev
)
360 struct macvlan_dev
*vlan
= netdev_priv(dev
);
362 dev_mc_sync(vlan
->lowerdev
, dev
);
365 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
367 struct macvlan_dev
*vlan
= netdev_priv(dev
);
369 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
376 * macvlan network devices have devices nesting below it and are a special
377 * "super class" of normal network devices; split their locks off into a
378 * separate class since they always nest.
380 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
381 static struct lock_class_key macvlan_netdev_addr_lock_key
;
383 #define MACVLAN_FEATURES \
384 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
385 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
386 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO)
388 #define MACVLAN_STATE_MASK \
389 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
391 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
392 struct netdev_queue
*txq
,
395 lockdep_set_class(&txq
->_xmit_lock
,
396 &macvlan_netdev_xmit_lock_key
);
399 static void macvlan_set_lockdep_class(struct net_device
*dev
)
401 lockdep_set_class(&dev
->addr_list_lock
,
402 &macvlan_netdev_addr_lock_key
);
403 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
406 static int macvlan_init(struct net_device
*dev
)
408 struct macvlan_dev
*vlan
= netdev_priv(dev
);
409 const struct net_device
*lowerdev
= vlan
->lowerdev
;
411 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
412 (lowerdev
->state
& MACVLAN_STATE_MASK
);
413 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
414 dev
->gso_max_size
= lowerdev
->gso_max_size
;
415 dev
->iflink
= lowerdev
->ifindex
;
416 dev
->hard_header_len
= lowerdev
->hard_header_len
;
418 macvlan_set_lockdep_class(dev
);
420 vlan
->rx_stats
= alloc_percpu(struct macvlan_rx_stats
);
427 static void macvlan_uninit(struct net_device
*dev
)
429 struct macvlan_dev
*vlan
= netdev_priv(dev
);
431 free_percpu(vlan
->rx_stats
);
434 static struct net_device_stats
*macvlan_dev_get_stats(struct net_device
*dev
)
436 struct net_device_stats
*stats
= &dev
->stats
;
437 struct macvlan_dev
*vlan
= netdev_priv(dev
);
439 dev_txq_stats_fold(dev
, stats
);
441 if (vlan
->rx_stats
) {
442 struct macvlan_rx_stats
*p
, rx
= {0};
445 for_each_possible_cpu(i
) {
446 p
= per_cpu_ptr(vlan
->rx_stats
, i
);
447 rx
.rx_packets
+= p
->rx_packets
;
448 rx
.rx_bytes
+= p
->rx_bytes
;
449 rx
.rx_errors
+= p
->rx_errors
;
450 rx
.multicast
+= p
->multicast
;
452 stats
->rx_packets
= rx
.rx_packets
;
453 stats
->rx_bytes
= rx
.rx_bytes
;
454 stats
->rx_errors
= rx
.rx_errors
;
455 stats
->rx_dropped
= rx
.rx_errors
;
456 stats
->multicast
= rx
.multicast
;
461 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
462 struct ethtool_drvinfo
*drvinfo
)
464 snprintf(drvinfo
->driver
, 32, "macvlan");
465 snprintf(drvinfo
->version
, 32, "0.1");
468 static u32
macvlan_ethtool_get_rx_csum(struct net_device
*dev
)
470 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
471 return dev_ethtool_get_rx_csum(vlan
->lowerdev
);
474 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
475 struct ethtool_cmd
*cmd
)
477 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
478 return dev_ethtool_get_settings(vlan
->lowerdev
, cmd
);
481 static u32
macvlan_ethtool_get_flags(struct net_device
*dev
)
483 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
484 return dev_ethtool_get_flags(vlan
->lowerdev
);
487 static const struct ethtool_ops macvlan_ethtool_ops
= {
488 .get_link
= ethtool_op_get_link
,
489 .get_settings
= macvlan_ethtool_get_settings
,
490 .get_rx_csum
= macvlan_ethtool_get_rx_csum
,
491 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
492 .get_flags
= macvlan_ethtool_get_flags
,
495 static const struct net_device_ops macvlan_netdev_ops
= {
496 .ndo_init
= macvlan_init
,
497 .ndo_uninit
= macvlan_uninit
,
498 .ndo_open
= macvlan_open
,
499 .ndo_stop
= macvlan_stop
,
500 .ndo_start_xmit
= macvlan_start_xmit
,
501 .ndo_change_mtu
= macvlan_change_mtu
,
502 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
503 .ndo_set_mac_address
= macvlan_set_mac_address
,
504 .ndo_set_multicast_list
= macvlan_set_multicast_list
,
505 .ndo_get_stats
= macvlan_dev_get_stats
,
506 .ndo_validate_addr
= eth_validate_addr
,
509 static void macvlan_setup(struct net_device
*dev
)
513 dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
514 dev
->netdev_ops
= &macvlan_netdev_ops
;
515 dev
->destructor
= free_netdev
;
516 dev
->header_ops
= &macvlan_hard_header_ops
,
517 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
518 dev
->tx_queue_len
= 0;
521 static int macvlan_port_create(struct net_device
*dev
)
523 struct macvlan_port
*port
;
527 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
530 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
535 INIT_LIST_HEAD(&port
->vlans
);
536 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
537 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
539 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
543 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
547 static void macvlan_port_rcu_free(struct rcu_head
*head
)
549 struct macvlan_port
*port
;
551 port
= container_of(head
, struct macvlan_port
, rcu
);
555 static void macvlan_port_destroy(struct net_device
*dev
)
557 struct macvlan_port
*port
= macvlan_port_get(dev
);
559 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
560 netdev_rx_handler_unregister(dev
);
561 call_rcu(&port
->rcu
, macvlan_port_rcu_free
);
564 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
566 if (tb
[IFLA_ADDRESS
]) {
567 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
569 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
570 return -EADDRNOTAVAIL
;
573 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
574 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
575 case MACVLAN_MODE_PRIVATE
:
576 case MACVLAN_MODE_VEPA
:
577 case MACVLAN_MODE_BRIDGE
:
586 static int macvlan_get_tx_queues(struct net
*net
,
588 unsigned int *num_tx_queues
,
589 unsigned int *real_num_tx_queues
)
591 struct net_device
*real_dev
;
596 real_dev
= __dev_get_by_index(net
, nla_get_u32(tb
[IFLA_LINK
]));
600 *num_tx_queues
= real_dev
->num_tx_queues
;
601 *real_num_tx_queues
= real_dev
->real_num_tx_queues
;
605 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
606 struct nlattr
*tb
[], struct nlattr
*data
[],
607 int (*receive
)(struct sk_buff
*skb
),
608 int (*forward
)(struct net_device
*dev
,
609 struct sk_buff
*skb
))
611 struct macvlan_dev
*vlan
= netdev_priv(dev
);
612 struct macvlan_port
*port
;
613 struct net_device
*lowerdev
;
619 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
620 if (lowerdev
== NULL
)
623 /* When creating macvlans on top of other macvlans - use
624 * the real device as the lowerdev.
626 if (lowerdev
->rtnl_link_ops
== dev
->rtnl_link_ops
) {
627 struct macvlan_dev
*lowervlan
= netdev_priv(lowerdev
);
628 lowerdev
= lowervlan
->lowerdev
;
632 dev
->mtu
= lowerdev
->mtu
;
633 else if (dev
->mtu
> lowerdev
->mtu
)
636 if (!tb
[IFLA_ADDRESS
])
637 random_ether_addr(dev
->dev_addr
);
639 if (!macvlan_port_exists(lowerdev
)) {
640 err
= macvlan_port_create(lowerdev
);
644 port
= macvlan_port_get(lowerdev
);
646 vlan
->lowerdev
= lowerdev
;
649 vlan
->receive
= receive
;
650 vlan
->forward
= forward
;
652 vlan
->mode
= MACVLAN_MODE_VEPA
;
653 if (data
&& data
[IFLA_MACVLAN_MODE
])
654 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
656 err
= register_netdevice(dev
);
660 list_add_tail(&vlan
->list
, &port
->vlans
);
661 netif_stacked_transfer_operstate(lowerdev
, dev
);
666 if (list_empty(&port
->vlans
))
667 macvlan_port_destroy(lowerdev
);
671 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
673 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
674 struct nlattr
*tb
[], struct nlattr
*data
[])
676 return macvlan_common_newlink(src_net
, dev
, tb
, data
,
681 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
683 struct macvlan_dev
*vlan
= netdev_priv(dev
);
684 struct macvlan_port
*port
= vlan
->port
;
686 list_del(&vlan
->list
);
687 unregister_netdevice_queue(dev
, head
);
689 if (list_empty(&port
->vlans
))
690 macvlan_port_destroy(port
->dev
);
692 EXPORT_SYMBOL_GPL(macvlan_dellink
);
694 static int macvlan_changelink(struct net_device
*dev
,
695 struct nlattr
*tb
[], struct nlattr
*data
[])
697 struct macvlan_dev
*vlan
= netdev_priv(dev
);
698 if (data
&& data
[IFLA_MACVLAN_MODE
])
699 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
703 static size_t macvlan_get_size(const struct net_device
*dev
)
705 return nla_total_size(4);
708 static int macvlan_fill_info(struct sk_buff
*skb
,
709 const struct net_device
*dev
)
711 struct macvlan_dev
*vlan
= netdev_priv(dev
);
713 NLA_PUT_U32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
);
720 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
721 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
724 int macvlan_link_register(struct rtnl_link_ops
*ops
)
727 ops
->priv_size
= sizeof(struct macvlan_dev
);
728 ops
->get_tx_queues
= macvlan_get_tx_queues
;
729 ops
->setup
= macvlan_setup
;
730 ops
->validate
= macvlan_validate
;
731 ops
->maxtype
= IFLA_MACVLAN_MAX
;
732 ops
->policy
= macvlan_policy
;
733 ops
->changelink
= macvlan_changelink
;
734 ops
->get_size
= macvlan_get_size
;
735 ops
->fill_info
= macvlan_fill_info
;
737 return rtnl_link_register(ops
);
739 EXPORT_SYMBOL_GPL(macvlan_link_register
);
741 static struct rtnl_link_ops macvlan_link_ops
= {
743 .newlink
= macvlan_newlink
,
744 .dellink
= macvlan_dellink
,
747 static int macvlan_device_event(struct notifier_block
*unused
,
748 unsigned long event
, void *ptr
)
750 struct net_device
*dev
= ptr
;
751 struct macvlan_dev
*vlan
, *next
;
752 struct macvlan_port
*port
;
754 if (!macvlan_port_exists(dev
))
757 port
= macvlan_port_get(dev
);
761 list_for_each_entry(vlan
, &port
->vlans
, list
)
762 netif_stacked_transfer_operstate(vlan
->lowerdev
,
765 case NETDEV_FEAT_CHANGE
:
766 list_for_each_entry(vlan
, &port
->vlans
, list
) {
767 vlan
->dev
->features
= dev
->features
& MACVLAN_FEATURES
;
768 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
769 netdev_features_change(vlan
->dev
);
772 case NETDEV_UNREGISTER
:
773 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
774 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, NULL
);
776 case NETDEV_PRE_TYPE_CHANGE
:
777 /* Forbid underlaying device to change its type. */
783 static struct notifier_block macvlan_notifier_block __read_mostly
= {
784 .notifier_call
= macvlan_device_event
,
787 static int __init
macvlan_init_module(void)
791 register_netdevice_notifier(&macvlan_notifier_block
);
793 err
= macvlan_link_register(&macvlan_link_ops
);
798 unregister_netdevice_notifier(&macvlan_notifier_block
);
802 static void __exit
macvlan_cleanup_module(void)
804 rtnl_link_unregister(&macvlan_link_ops
);
805 unregister_netdevice_notifier(&macvlan_notifier_block
);
808 module_init(macvlan_init_module
);
809 module_exit(macvlan_cleanup_module
);
811 MODULE_LICENSE("GPL");
812 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
813 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
814 MODULE_ALIAS_RTNL_LINK("macvlan");